Convierte números a y desde números romanos
Numbers above 3,999 use vinculum notation: a line above a numeral multiplies its value by 1,000.
So XLIXDCLXXXII = 49.682.
Did you know?
Fibonacci's Sales Pitch
Fibonacci didn't invent Hindu-Arabic numerals — they originated in India around 500 AD. But his 1202 book Liber Abaci was essentially a 600-page argument that these new numbers were better for business. He showed European merchants how place value and zero could transform trade and banking. He was right. By 1500, the debate was over.
Read more →The Subtraction Rule: Elegant Shorthand
The subtraction rule is what makes Roman numerals clever rather than just tedious. Instead of writing IIII for 4, you write IV: "one before five." Instead of DCCCC for 900, you write CM: "one hundred before one thousand." Only six subtractive pairs exist (IV, IX, XL, XC, CD, CM), and once you know them, you can read any Roman numeral instantly.
Read more →¿De dónde vienen los números romanos?
Se cree que los números romanos provienen de señales con las manos y marcas de conteo. El trazo I representa un dedo, la V representa el hueco entre el pulgar y los dedos para el cinco, y la X representa las manos cruzadas para el diez. Las letras L, C, D y M provienen de modificaciones de letras griegas como chi, theta y phi para representar 50, 100, 500 y 1.000. Con el tiempo, estas marcas se transformaron en las letras latinas que se reconocen hoy. No existe el 0 en el alfabeto romano, ya que el concepto del número 0 no se desarrolló plenamente hasta que la India lo inventó alrededor del 600 d.C. / 10600 HE.